Geological Range: Last occurrence (top): within Kimmeridgian Stage (152.06-157.25Ma, top in Kimmeridgian stage). Data source: Total of range of species in this databaseFirst occurrence (base): within Oxfordian Stage (157.25-163.47Ma, base in Oxfordian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous